Staging Environment: Content and features may be unstable or change without notice.
Advisory details: github_osv / GHSA-g4m9-5hpf-hx72
Advisory ID github_osv/GHSA-g4m9-5hpf-hx72
Aliases CVE-2020-5275
Summary Firewall configured with unanimous strategy was not actually unanimous in Symfony Description ----------- On Symfony before 4.4.0, when a `Firewall` checks an access control rule (using the unanimous strategy), it iterates over all rule attributes and grant access only if *all* calls to the `accessDecisionManager` decide to grant access. As of Symfony 4.4.0, a bug was introduced that prevents the check of attributes as soon as `accessDecisionManager` decide to grant access on one attribute. Resolution ---------- The `accessDecisionManager` is now called with all attributes at once, allowing the unanimous strategy being applied on each attribute. The patch for this issue is available [here](https://github.com/symfony/symfony/commit/c935e4a3fba6cc2ab463a6ca382858068d63cebf) for the 4.4 branch. Credits ------- I would like to thank Antonio J. García Lagar for reporting & Robin Chalas for fixing the issue.
Status Published
Exploitability 0.5
Weighted Severity 6.8
Risk 3.4
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (1)
CWE-285 Improper Authorization
System Score Found at
cvssv3.1 7.6 https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/03/GHSA-g4m9-5hpf-hx72/GHSA-g4m9-5hpf-hx72.json
generic_textual HIGH
Reference id Reference type URL
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security/CVE-2020-5275.yaml
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2020-5275.yaml
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2020-5275.yaml
https://github.com/symfony/symfony/commit/c935e4a3fba6cc2ab463a6ca382858068d63cebf
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/C36JLPHUPKDFAX6D5WYFC4ALO2K7RDUQ
https://symfony.com/cve-2020-5275
CVE-2020-5275 https://nvd.nist.gov/vuln/detail/CVE-2020-5275
GHSA-g4m9-5hpf-hx72 https://github.com/symfony/symfony/security/advisories/GHSA-g4m9-5hpf-hx72
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N Found at https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/03/GHSA-g4m9-5hpf-hx72/GHSA-g4m9-5hpf-hx72.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

There are no SSVC decisions available.